Question about 2003 Yamaha YZ 250

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Metal in the crank case

I have a 1998 yamaha yz250. the piston has exploded more or less the front side has shattered about half way up the piston and the back side has a small hole in it. when it exploded there is now chunks of metal in the crank case. is there anyway to get them out with out having to splite the case?

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  • A Miller May 11, 2010

    Whats the point of this? Are yo going to repair the engine? It needs to come apart. Your engine may not be economically repairable.

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Splitting the case is not that hard esp. on 2-strokes. failure to remove all the pieces can result in further more costly engine damage.

you should at least remove the engine and flush thoroughly with the cylinder and all drains and covers removed. after this you should be ready to rebuild it.


Posted on Oct 06, 2009

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